《千年生态系统评估》

揭示生态系统变化对人类福祉的影响警醒决策者与公众做出积极反应。[编者按]     

抚仙湖面源污染特征及其防治对策

根据抚仙湖径流区污染物负荷量的调查结果,抚仙湖水污染特征以面源为主,面源入湖水量占98%,TP占81.4%,TN占85.9%,因此控制面源是保护抚仙湖的关键。提出了防治抚仙湖面源污染的生态治理及工程治理对策。     

元磨高速公路边坡生物防护技术研究

对云南元磨高速公路的边坡生物防护的植物筛选技术和施工工艺进行了研究。试验探索了湿法喷播中草灌的比例问题，发现了短萼灰叶(山毛豆)是适宜的灌木种，并提出了“两步施工法”。     

Spatial variations in daily average CO2 concentrations above wetland surface of Xianghai National Nature Reserve, China

Horizontal and vertical variations of daily average CO2 concentration above the wetland surface were studied in Xianghai National Nature Reserve of China in August, 2000. The primary purpose was to study spatial distribution characteristics of CO2 concentration on the four levels of height(0.1 m, 0.6 m, 1.2 m and 2 m) and compare the differences of CO2 concentration under different land covers. Results showed that daily average CO2 concentration above wetland surface in Xianghai National Natural Reserve was lower than that above other wetlands in northeast China as well as the worldwide average, suggesting that Xianghai wetland absorbed CO2 in August and acted as“sink” of CO2. The horizontal variations on the four levels of height along the latitude were distinct, and had the changing tendency of“decreasing after increasing” with the increase of height. The areas with obvious variations were consistent on different levels of height,and those with the highest variations appeared above surface of shore, sloping field, Typha wetland and Phragmites wetland; the vertical variations were greatly different, with the higher variations in Phragmites wetland and Typha wetland, and the lands near the shore and the sloping field with the lower variations. Spatial variations of daily average CO2 concentrations above wet!and surface were affected by surface qualities and land covers.     

Application of compost in agricultural practice could potentially cause contamination of foodstuffs with pathogenic bacteria such as Escherichia coli O157:H7. This study investigated pathogenic bacteria in compost collected from the compost facilities, an

IntroductionIncreasing public interests have been concerned onsafety foods and the environmental aspects recently,especially on the so-called organic foods , which are madefromcrops grown with organic fertilizers or compost but notchemical fertilizers .Pu…     

过程工业安全仪表系统的等级评定

介绍了安全整体性要求级别、安全联锁系统评定的内容、安全联锁系统评定的程序以及确定安全仪表联锁系统等级的方法,并介绍了安全保护层分析在安全联锁系统评定中的应用.     

江苏省环保信访演变趋势与对策研究

以江苏省为例,着重分析环保信访演变的特点和发展趋势以及产生的主要原因,提出了今后进一步加强环保信访工作的对策措施。     

合肥台地电阻率干扰综述

本文首先叙述了合肥台地电阻率值ρS的观测环境,并根据合肥台近年几次ρS的异常变化,通过初步理论分析,找出了DD-1接地体、电缆沟开挖、大气降水、太阳黑子引起的自然电场对ρS的干扰,为以后排除和识别地电干扰起参考作用.     

积极推行清洁生产提高企业经济效益

清洁生产是企业防治污染的方向,是提高环境保护管理水平的途径,文中主要阐述了企业推行清洁生产的条件及重要意义,为企业节能降耗实施可持续发展提供保障.     

Effect of long-term fertilization on soil nitrate distribution

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